nymaim | ec479b888f305f2d4ab4c79167e0108ad473be3ad580297b2c1201292373b5df

Analysis

max time kernel
152s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
18/11/2022, 22:17

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General

Target
file.exe
Size 2.0MB
Sample221118-17b39aee3v
SHA256 ec479b888f305f2d4ab4c79167e0108ad473be3ad580297b2c1201292373b5df
MD5 e9294d745cd1376344b00c80fa5cfb2f
SHA1 0842d32abf75cf1ee6231be53f52f126ea9d4813
SHA512 9ee9232439da6479761a592595869800afa49b66d1d142d2422e8fae2157714ae63c0fc3a8daade1123bf2af6766432e86f4f1c044f0f6be6905ac06cd9451ca
SSDEEP 49152:q2uZezAjfyLnTDn7ZN1fZ3jxzBwmFu5JSc1yHfRx7Pq2:ruczAsTfFfZ3pBwmuHSc0PD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

45.139.105.171
85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
900	is-LLCCE.tmp
4588	grsearcher83.exe
4908	K1twF.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2386679933-1492765628-3466841596-1000\Control Panel\International\Geo\Nation	grsearcher83.exe

Loads dropped DLL 1 IoCs

pid	Process
900	is-LLCCE.tmp

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 12 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\grSearcher\is-RLLEI.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-RIAFM.tmp	is-LLCCE.tmp
File opened for modification	C:\Program Files (x86)\grSearcher\unins000.dat	is-LLCCE.tmp
File opened for modification	C:\Program Files (x86)\grSearcher\grsearcher83.exe	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-ICALT.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-CTP2Q.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-0KJ6U.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-B39AC.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-M6M17.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-2A3RI.tmp	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\unins000.dat	is-LLCCE.tmp
File created	C:\Program Files (x86)\grSearcher\is-717QO.tmp	is-LLCCE.tmp

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
3696	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4588	grsearcher83.exe
4588	grsearcher83.exe
4588	grsearcher83.exe
4588	grsearcher83.exe
4588	grsearcher83.exe
4588	grsearcher83.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4588	grsearcher83.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3696	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3412 wrote to memory of 900	3412	file.exe	81
PID 3412 wrote to memory of 900	3412	file.exe	81
PID 3412 wrote to memory of 900	3412	file.exe	81
PID 900 wrote to memory of 4588	900	is-LLCCE.tmp	82
PID 900 wrote to memory of 4588	900	is-LLCCE.tmp	82
PID 900 wrote to memory of 4588	900	is-LLCCE.tmp	82
PID 4588 wrote to memory of 4908	4588	grsearcher83.exe	83
PID 4588 wrote to memory of 4908	4588	grsearcher83.exe	83
PID 4588 wrote to memory of 4908	4588	grsearcher83.exe	83
PID 4588 wrote to memory of 4024	4588	grsearcher83.exe	96
PID 4588 wrote to memory of 4024	4588	grsearcher83.exe	96
PID 4588 wrote to memory of 4024	4588	grsearcher83.exe	96
PID 4024 wrote to memory of 3696	4024	cmd.exe	98
PID 4024 wrote to memory of 3696	4024	cmd.exe	98
PID 4024 wrote to memory of 3696	4024	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3412
- C:\Users\Admin\AppData\Local\Temp\is-B81HU.tmp\is-LLCCE.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-B81HU.tmp\is-LLCCE.tmp" /SL4 $30044 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1798708 54784
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:900
- - C:\Program Files (x86)\grSearcher\grsearcher83.exe
    "C:\Program Files (x86)\grSearcher\grsearcher83.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of WriteProcessMemory
    PID:4588
  - - C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\K1twF.exe
      4⤵
      Executes dropped EXE
      PID:4908
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "grsearcher83.exe" /f & erase "C:\Program Files (x86)\grSearcher\grsearcher83.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4024
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "grsearcher83.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:3696

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

grsearcher83.exe

Path C:\Program Files (x86)\grSearcher\grsearcher83.exe
Size 2.8MB
SHA256 c782275b8d3109dfc3f96f2b9d56a4e9f75ddd6c04461fdc7fdb7779742fd387
MD5 bc504b168085f4e5a87114aa5eb1ff6b
SHA1 3112a15d1bf1483c7ae1c0cf91b9f18285f277ed
SHA512 9d4e8a9127154b6a914307645b977e76afdb11d2b77c5da471cdb190f5f22f5e484c29f5569aa44f54284b263b00f288cc43416b859e44ccd7d76781d4020f76
SSDEEP 49152:IbYoajoNNvfNOSVSb1+/zShvBUMMS5dhQLt0ioSfHeI3gVEpk9K:PU3kbuOpBUMMS5dhQ6ioS+I3gVEpkA
MD5 SHA1 SHA512 SSDEEP

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grsearcher83.exe

Path C:\Program Files (x86)\grSearcher\grsearcher83.exe
Size 2.8MB
SHA256 c782275b8d3109dfc3f96f2b9d56a4e9f75ddd6c04461fdc7fdb7779742fd387
MD5 bc504b168085f4e5a87114aa5eb1ff6b
SHA1 3112a15d1bf1483c7ae1c0cf91b9f18285f277ed
SHA512 9d4e8a9127154b6a914307645b977e76afdb11d2b77c5da471cdb190f5f22f5e484c29f5569aa44f54284b263b00f288cc43416b859e44ccd7d76781d4020f76
SSDEEP 49152:IbYoajoNNvfNOSVSb1+/zShvBUMMS5dhQLt0ioSfHeI3gVEpk9K:PU3kbuOpBUMMS5dhQ6ioS+I3gVEpkA
MD5 SHA1 SHA512 SSDEEP

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is-LLCCE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B81HU.tmp\is-LLCCE.tmp
Size 659KB
SHA256 fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
MD5 34a3efb47055787f7a4537fb08fb93ec
SHA1 7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA512 055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
SSDEEP 12288:1kxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphjxgA:SFRCUn4rP/37YzHXA6QJsoPtIpxxgA
MD5 SHA1 SHA512 SSDEEP

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is-LLCCE.tmp

Path C:\Users\Admin\AppData\Local\Temp\is-B81HU.tmp\is-LLCCE.tmp
Size 659KB
SHA256 fe0505386751f6c7a49d4b3594cc99c8936a9906e49c595934e586f0b9a9e409
MD5 34a3efb47055787f7a4537fb08fb93ec
SHA1 7396195a1bc60f31bb90b5c8abf4b4ce95ec06f9
SHA512 055b18c604aa583f0150f39e564438e15cd07dff308212a2c508978e2347224e2c7979f5066fb4f4e9073d5a76ee845d659214cd5f8669ce808e74d0078520ff
SSDEEP 12288:1kxzRCUn4rP/37YzHXA6/YUKsGjQNw4qpRRpDWowphjxgA:SFRCUn4rP/37YzHXA6QJsoPtIpxxgA
MD5 SHA1 SHA512 SSDEEP

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_iscrypt.dll

Path C:\Users\Admin\AppData\Local\Temp\is-UR6MV.tmp\_isetup\_iscrypt.dll
Size 2KB
SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
MD5 a69559718ab506675e907fe49deb71e9
SHA1 bc8f404ffdb1960b50c12ff9413c893b56f2e36f
SHA512 e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63
MD5 SHA1 SHA512

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K1twF.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\K1twF.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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K1twF.exe

Path C:\Users\Admin\AppData\Roaming\{6cebb340-6208-11ed-bf50-806e6f6e6963}\K1twF.exe
Size 72KB
SHA256 27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6
MD5 3fb36cb0b7172e5298d2992d42984d06
SHA1 439827777df4a337cbb9fa4a4640d0d3fa1738b7
SHA512 6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c
SSDEEP 1536:bvUpDLxyxA14o3/M238r6+XfHAgbqmE8MpKdwuasZLUM7DsWlXcdyZgfmi:WDLZKa/MtXfHAgbqmEtxsfmyZgfmi
MD5 SHA1 SHA512 SSDEEP

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memory/3412-138-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3412-156-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/3412-132-0x0000000000400000-0x0000000000414000-memory.dmp

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memory/4588-143-0x0000000000400000-0x00000000014C8000-memory.dmp

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memory/4588-148-0x0000000010000000-0x000000001001B000-memory.dmp

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memory/4588-152-0x0000000000400000-0x00000000014C8000-memory.dmp

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memory/4588-144-0x0000000000400000-0x00000000014C8000-memory.dmp

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memory/4588-142-0x0000000000400000-0x00000000014C8000-memory.dmp

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memory/4588-155-0x0000000000400000-0x00000000014C8000-memory.dmp

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